Self-locking door operating mechanism



Jan. 7, 1936. H. ERI CKSO N SELF LOCKING DOOR OPERATING MECHANISM k 2 Sheeis-Sheet 1 Filed Dec. 12, 1933 Fig.2

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Jan. 7, 1936. H. ERICKSON 2,026,876

SELF LOCKING DOOR OPERATING MECHANISM Filed Dec. 12, 1953 2 Sheets-Sheet 2 Fi .5 7 Fi .4

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Patented Jan. 7, 1936 PATENT OFFICE SELF-LOCKING DOOR OPERATING MECHANISM 'Hjalmar Erickson, Bessemer, Township,

' Gogebic County, Mich.

Application December 12, 1933, Serial No; 702,070

2 Claims.

This invention relates to. door operating mechanism for opening and locking said door in open position and for closing said door and lock ing same in a closed position, all of which will be more fully hereinafter-set forth as shown in the accompanying drawings and finally pointed out in the appended claims.

Where doors are mechanically operated either upon hinges .or other devices, considerable effort is necessary to operate same properly and trouble arises in keeping said doors open and in a rigid position. Further that in closing said doors some mechanical device is necessary for the looking of same. It is my contention that a mechanical device hereby claimed as my invention will efficiently and properly open said doors with one operation, and also when in position will lock same in an open position, thus holding them rigid against any force tending to close them, and

when closed will lock said doors so that same cannot be opened from the-outside; all of which I claim can be done by my claimed invention more particularly described below.

Other objects and advantages will be made manifest in the following specification of ,an.em-. bodiment of the invention; it being understood that modifications, variations, and adaptations may be resorted-to within the scope and spirit of the invention as is here claimed.

In the drawings:

Figure 1 is a top plan view of two doors and their operating mechanisms, showing the application of the structure embodying my invention with the parts shown in full lines when the doors are completely opened. a

Figure 2 is a side elevation view of'the doors as shown in Figure 1.

Figure 3 is a top plan view of two doors and their operating mechanisms, showing the application of a structure embodying my invention with doors in a completely closed position.

Figure 4 is a side elevation view showing the doors in the same position as Figure 3.

The doors are indicated as I and 2 and may be of the usual or any ordinary or desired form, type or structure, and in the form shown, are hinged or pivoted at one vertical edge thereof to the adjacent wall joints or other door in the ordinary manner.

In one application an angle bracket 3 is placed at right angles towall 5 and attached thereto by bolts 4 at a height convenient for manual operation. A bearing bracket 1 is mounted on the face of the angle bracket 3 by two bolts 20, which pass 5 through the slot 2| in the angle bracket 3, thus allowing; for adjustment. Operating lever 8 is mounted on the: bearing bracket 1 by means of a cap screw Gwhich acts as a fulcrum for same. A connectinglink. consisting of suitable castings I0 and I4 connected bya bar I2 which is thread- 5 ed to allow for adjustments, and which when adjusted, is .lockedby the jam nuts I3, is pivoted on the lever B at 9 bymea-ns of a cap screw. At It a bearing. bracket is shown fastened to the door .I by bolts II. At I5 is shown the pivot connec- 10 tion of the connecting link casting I4 to the bracket I6 by a bolt leaving it free to rotate.

The arrangement is. such that when the parts are properly adjusted and when thedoor which is in an opened position or more particularly at 15 an angle of ninety degrees to the closed position of the door, as shownin Figure 1, the operating lever 8 comes to aresting stop against the door stop shown at II in Figures 1 and 2. When the lever 8 is in this position, the pivot at 9 will have 20 passed the deadcenter line indicated as AA in Figure 1. Hence any force acting upon and tending to close the door I will force. the lever 8 tighter against H. A.lock-ing action is thus accomplished which can only be broken by moving the, lever 8 in adirectionindicatedby an arrow at 34, so that the pivot at 9 will have passed the dead center line shown at AA in Figure 1.

As the lever 8 is rotated in the direction indicated by arrow at 34 in Figure 1 and the rotation 30 continued until the lever has assumed the position as indicated at 8 in Figure 3, the door I will obviously have been brought to a closed position as indicated in Figures 3 and 4. A suitable stopping device shown as I8 in Figure 1 is fas- 35 tened to the angle bracket 3 by means of the bolts 20 and serves to stop the lever B at the position shown in Figure 3. This position is adjustable by means of the set screw and lock nut shown at I9, which are a part of the device I8. When the lever 8 is in the position as shown in Figure 3, the pivot at 9 will have passed the dead center line indicated as line C-C in Figure 3, thus looking the door I in its closed position. Hence any force acting upon and tending to open the door I will force the lever 8 against the set screw I9, which makes it impossible to open the door until the' locking action has been broken by rotating the lever 8 in the direction indicated by the arrow shown at 35 in Figure 3. 50

In the other application, that is where one door is hinged or pivoted by one vertical edge thereof to an adjacent door as is also shown in the Figures 1, 2, 3 and 4. A supporting bracket 22 is fastened to the door I by means of the bolts 23 as shown in Figures 1 and 2 at a height convenient for manual operation. Operating lever 25 is mounted on the supporting bracket 22 by means of the cap screw 24 which acts as a fulcrum for same. An adjustable connecting link consisting of suitable castings 21 and 30 connected by a bar 28 which is threaded to allow for adjustments and which when adjusted is locked by the jam nuts 29, is pivoted on the levers 25 at 26 by means of a cap screw. A bracket 32 including an extension in the form of an arm, is shown fastened to door 2, Figures 1 and 2, by means of the bolts 33 with the arm spaced from but bridging the joint between the doors. At 3| is shown a pivoted connection of the connecting link casting 30 to the outer end of the arm of the bracket 32 by means of a bolt, leaving the casting 30 free to rotate.

The arrangement is such that when the parts are properly adjusted and when as in Figures 1 and 2 the door is in an open position or more particularly at an angle of 90 degrees to the closed position of the door, the operating lever 25 comes to a resting stop against the edge of door I. When the lever 25 is in this position, the pivot at 26 will have passed the dead center line indicated as B-B in Figure 1. Hence any force acting upon and tending to close door 2 will force the lever 25 tighter against the edge of door I. A locking action is thus accomplished which can only be broken by moving the lever 25 in a direction indicated by arrow 36 so that the pivot at 26 will have passed the dead centerline shown as BB in Figure 1.

As the lever 25 is rotated in the direction indicated by the arrow 36 in Figure 1 and the rotation continued until the lever has assumed the position as indicated at 25 in Figures 3 and 4, the door 2 will obviously have been brought to a closed position as indicated in Figures 3 and 4 and the lever has come to a resting stop against the face of door I. When the lever 25 is in the position as shown in Figure 3, the pivot at 25 will have passed the .dead center line indicated as line DD in Figure 3, thus locking the door 2 in its closed position. Hence any force acting upon abutment means.

and tending to open door 2 will force the lever 25 tighter against the face of door I, thus making it impossible to open door 2 until the locking action has been broken by rotating the lever 25 in the direction indicated by the arrow 31 in Figure 3.

What I claim is:

1. In an operating and locking mechanism for doors, an angle bracket adapted to have one arm fixed to a stationary support, a bearing bracket adjustably mounted on the other arm, a bearing bracket secured to a door hinged to the stationary support, an operating lever having one end pivotally connected with the first mentioned bearing bracket, a link having one end pivotally connected with the second mentioned bearing bracket and its opposite end pivotally connected to the operating lever intermediate its ends, and separate means secured to the stationary support and the angle bracket respectively for disposal in the path of the operating lever beyond the dead center position of the latter and link to secure said door in open and closed positions.

2. In an operating and locking mechanism for doors, a right angle bracket having one arm slotted longitudinally and its other arm adapted to be fixed to a stationary support, a bearing bracket and an abutment means, means connecting the bearing bracket and the abutment means together and passing through the slot for adjustment of said bearing bracket and abutment means on the slotted arm, a bearing bracket to be secured to a door hinged to the stationary support, an operating lever having one end pivotally connected to the first mentioned bearing bracket, a link having one end pivotally connected to the second mentioned bearing bracket and its opposite end pivotally connected to the operating lever intermediate its ends, means together with the abutment means for disposal in the path of the operating lever beyond the respective dead center positions of the latter and link to secure said door in open and closed positions, and adjustment means included in' the v HJALMAR ERICKSON. 

